Using density functional theory calculations we show that the recently synthesized superhard diamondlike BC(5) is superconducting with a critical temperature of the same order as that of MgB(2). The average electron-phonon coupling is lambda=0.89, the phonon-frequency logarithmic average is (log)=67.4 meV, and the isotope coefficients are alpha(C)=0.3 and alpha(B)=0.2. In BC(5), superconductivity is mostly sustained by concerted vibrations of the B atom and its C neighbors.
High-T(c) superconductivity in superhard diamondlike BC(5) / Calandra, Matteo; Mauri, Francesco. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 101:1(2008). [10.1103/PhysRevLett.101.016401]
High-T(c) superconductivity in superhard diamondlike BC(5)
Mauri, Francesco
2008
Abstract
Using density functional theory calculations we show that the recently synthesized superhard diamondlike BC(5) is superconducting with a critical temperature of the same order as that of MgB(2). The average electron-phonon coupling is lambda=0.89, the phonon-frequency logarithmic average is (log)=67.4 meV, and the isotope coefficients are alpha(C)=0.3 and alpha(B)=0.2. In BC(5), superconductivity is mostly sustained by concerted vibrations of the B atom and its C neighbors.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
